diff --git a/src/shared/FileInfoCollection.php b/src/shared/FileInfoCollection.php
index 33a0f057..fd5cf25c 100644
--- a/src/shared/FileInfoCollection.php
+++ b/src/shared/FileInfoCollection.php
@@ -11,7 +11,7 @@ class FileInfoCollection implements \Iterator, \Countable {
         /**
          * @var FileInfo[]
          */
-        private $data;
+        private $data = [];
 
         /**
          * @var int